问题
解答题
脱式计算下列各小题,写出计算步骤.
(1)63×39+39×37
(2)73×(46+54)-568.
答案
(1)63×39+39×37
=(63+37)×39,
=100×39,
=3900;
(2)73×(46+54)-568,
=73×100-568,
=7300-568,
=6732.
脱式计算下列各小题,写出计算步骤.
(1)63×39+39×37
(2)73×(46+54)-568.
(1)63×39+39×37
=(63+37)×39,
=100×39,
=3900;
(2)73×(46+54)-568,
=73×100-568,
=7300-568,
=6732.